Concrete floor construction.



0. W. NORCRCSS.

CONCRETE FLOOR CONSTRUCTION.

APPLIUATION FILED SEPT. so, 1914.

1,1 33,658, Patented lvl-CL..A fsu. i915.

2 SHEBTS-SHLET l.

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0. W. NORCROSS. OONORBTB FLOOR CONSTRUCTION.

APPLICATION FILED SEPT. 30, 1914.

MOMO@ z SHEETS-SHEET 2.

Patented Mar. 30, 1915.

iunirnn srnrrns ne ORLANDO W. l:i\lliItiROSS, 0E' NURSES-HER, MASSAGHUSETTS.

aerienne.

To all wwm may concern:

Be it known that I, ORLANDO W. Non; cnoss, a citizen ofthe United States, residing at ilorcester, in the county of Worcester and State of Massachusetts,have invented a new aiiduseful Concrete Floor Construction., of which the following is a specifica The principal 'objects of this invention are to provide an inexpensive and practical concrete construction for a floor in which y each rectangle of concrete formed between the four posts or columns will in itself constitute an arch capable of resisting immense strains, having a maximum of strength with a minimum amount of metal reinforcement, and in which the did'erent units of the floor can be arranged entirely separate yfroni each other and will not in any way i which would have to give-way at all points and crush the concrete in order to yield anywhere; and I also provide a convenient and inexpensive way lof firmly securing these irons together and strengthening the structure.,

The invention also involves other features of construction as will appear hereinafter.

Reference is to be had to the accoinpany-- ing drawings in wliich- `igure l is a plan of a portion of a Hoor constructed in accordance with this invention and showing only one of the concrete slabs; Fig. 2 isa sectional view on the line 2-2 of Eig; l; Fig. 3 is a plan of another embodiment of the invention, and Fig. 4 is a plan 0f another form.

Many plans have been proposed for making concrete floors. The present invention relates to the type in which each unit of the floor, preferably Vof rectangular form resting at its four corners on columns, is a separate unit in itself, and is provided with a surrounding band of metal connected sel Specification of Letters Patent.

CONCRETE FLOOR CONSTRUCTION.

Application les September 30, 191e. Serial Ho. 8612,95,

curely together so as to form a continuous surrounding structure and resting on the four columns. In this way this band of metal which is relatively strong and rigid, although formed of tie members, resists forces tending to spread the four sides of each concrete member by transmitting these strains to the columns and by interposing a solid body of concrete from each column to the center of the rectangle which would have to be crushed in order to distend the other members at their centers. More in detail, I mean by this that any force tending to push out the centers of the four iron ties surrounding the concrete rectangle will be resisted by the connection ofthese ties with each other at the corners where they meet at the columns. In order toforce the center of one of the ties outwardly the corners would have to move inwardly toward the center of the rectangle. The latter motion is prevented bythe solid body of concrete which extends of course from each corner to the center of the concrete member, as it does to all parts thereof. In this way the well known great resistance of the body of concrete to a crushing strain is brought into full effect for the purpose of rendering each element independent and selfsustaining. The especial object of this invention is to provide improved means for connecting these ties.

Referring now to Figs. l and 2 of the drawings it will be seen that the floor is designed to be supported by columns, and,

two forros A andA. are shown. The former simply supports the floor and the other ysupports .the floor at another point and extends up through it for the purpose of supporting a floor or roof above. In either case the column is provided with a plate a and a on which the floor is directl supported.

For the purpose of carrying the concrete floor a series of ties shown in the forni of angle irons B is employed, radiating from the center of each column. These angle irons preferably are arranged in pairs at right 'angles to each other and with one flange of all the 'angle irons located. in a horizontal plane, the other flange in each casebeing arranged vertically.

Over the column A. the angle irons can be miteredoif at their ends so as to rest on the cap plate 'aon the column and tneet each other at a point directly' over the cohu series of Faim of Ha, bars each rrange with izs ends vertical and secure to the vertical anges of two of said angle ircns which' are in alinemeut with each other, thea central' part' each. cf said bars lynv horizontally over the wps of fathers nf sai angl@ irons. A

A suppartingfstmmfsur@ for am wncra fiom emmprsmg a couzmp., a plurality of nga imns radiating" from th@ column in a plane and paed wih one ange horizontal. and theher vel'zca, the inner @1161s of said ang@ irons resing on th@ eoumn, a series Bm; bars each arranged wh its @ms Vex-haai and `samms against th@ verica each bar lyn m'ges of zwcf vpposi angie foms ai; distanza@ from nhe clumn, the par', of horizontally ovex the tops of the ends af ot ers nf said angle irons, and a series of vertical angie pieces veted to #bhe ends of said-angle irons for sacung them logeiher over the colunm.

In fessmom'f whereof I have hanc, in t e presence of two subscribing wltnesss RLAND() WL NORCRGSS. Wnesses:

E. Fim, n C. FORBES? WESEON'S' hemmt@ set. 

